North Sea portfolio-building dominated the sector's news this week, headlined by Kistos Holdings (AIM:KIST) striking a binding deal to buy into a new gas development, while a mixed batch of results and operational updates spanned the spectrum from African explorers scrambling for working capital to Gulf of Mexico producers reporting a narrower loss and a UK independent lining up rigs for its next drilling campaign.
Kistos adds North Sea gas reserves via Abbey and Baker farm-in
Kistos Holdings (AIM:KIST), shares at 307.0p and down 1.6% on the day, has agreed to acquire a 30% non-operated working interest in the Abbey and Baker gas fields in the UK Southern North Sea, under a binding farmout agreement with operator Petrogas North Sea.
The deal extends a year of aggressive portfolio-building for the London-listed independent, which has already added Norwegian Ringhorne production licences and completed the acquisition of Oman Blocks 3 & 4 from Mitsui, and now layers in a gas-weighted UK development alongside its growing Middle East exposure.
The acquisition adds roughly 9 million barrels of oil equivalent of net 2P reserves once a final investment decision is taken, expected in 2027, lifting Kistos's pro forma 2P reserves, including the pending Oman transactions, to approximately 59 mmboe, up from 49.2 mmboe at the end of June.
The development is almost entirely gas, at roughly 98% of output, with first gas targeted for 2029 and net plateau production estimated at roughly 4,000 boepd. Baker was discovered in 2024 and Abbey appraised successfully in 2025; the development concept is selected, key engineering studies are complete, and a draft Field Development Plan and Environmental Statement were submitted in July 2026.
Four wells across the two fields will be tied back subsea to an existing nearby platform in approximately 40 metres of water, exporting into the UK National Transmission System, with gross production expected to peak near 18,000 boepd. Petrogas will retain operatorship with a 70% working interest after completion; financial terms were not disclosed, with further detail promised on completion.
"We are delighted to be partnering again with Petrogas, an operator we know well and whose technical work on these fields has been of a very high standard," said Andrew Austin, Executive Chairman.
The deal underscores Kistos's strategy of stacking optionality across multiple basins rather than committing to a single large project, but it also pushes more of the group's reserve base into pre-FID territory, nine of the incremental 9 mmboe hinge on a 2027 investment decision still to be taken, and first gas is three years out even if sanctioned.
The reserves uplift to 59 mmboe pro forma strengthens Kistos's claim to be assembling a genuinely diversified, multi-basin production base rather than a collection of mature UK North Sea tail assets.
Tower Resources raises £325,000 as farm-out completions slip
Tower Resources (AIM:TRP), down 8.97% to 0.0132p, has raised £325,000 through an equity issue after flagging a fresh delay to completion of its farm-out deals with Prime Global Energies covering the Thali licence in Cameroon and the PEL96 licence offshore Namibia.
The farm-outs, first announced in January 2025, are central to funding the Africa-focused explorer's near-term appraisal and development plans, and the latest slippage marks a reversal from just a month ago, when Tower expected at least one transaction to complete in October and said it did not anticipate needing fresh funds.
The company is issuing 2.5 billion new shares priced at 0.013p each, a roughly 7% discount to Friday's closing bid, with the board citing the need to cover working capital through the additional elapsed time. In Namibia, the Minister of Mines, Industries and Energy has requested amendments to Tower's PEL96 Petroleum Agreement, adding a further round of negotiation before that farm-out can close.
Chairman Jeremy Asher said he was in Windhoek working through the detail directly: "I am currently in Windhoek, where our country representative and I have been reviewing the draft texts for the PEL 96 Deed with our partners, including NAMCOR."
The repeated slippage, now stretching close to two years from the original January 2025 announcement, and the need for another dilutive raise despite earlier assurances to the contrary will test investor patience with a story that has long depended on farm-out proceeds rather than internally generated cash to advance its licences.
Kosmos Energy narrows quarterly net loss
Kosmos Energy (LSE:KOS), down 12.62% to 174.76p, reported a third-quarter net loss of $43 million, or $0.07 per diluted share, narrower than the $124 million loss a year earlier, as the deepwater oil and gas producer advanced debt reduction and completed a key refinancing of its reserve-based lending facility. Adjusted net income came in at $35 million, or $0.06 per diluted share, reversing an adjusted net loss of $72 million in the same period of 2025.
Revenue rose to $410 million, or $71.39 per barrel of oil equivalent excluding derivative cash settlements, from $311 million a year earlier, while net production averaged approximately 69,200 boepd, up around 6% year-on-year, or roughly 17% once the divested Equatorial Guinea assets are excluded.
Production expense fell approximately 31% year-on-year in absolute terms to $102 million, or $17.72 per barrel, and the company generated free cash flow of approximately $90 million, its third consecutive quarter of positive free cash flow.
Chairman Andrew G. Inglis said: "With the RBL re-financing complete, we have further increased our financial resilience and will now look to address our 2028 bond maturities."
The sharp double-digit share price fall despite improving operating metrics suggests the market is looking past the quarter's progress and focusing on the looming 2028 bond maturities Inglis flagged, a reminder that balance-sheet repair, however real, has not yet translated into a re-rating for a stock still trading well below where its production and cash-flow trajectory might otherwise warrant.
Serica Energy secures rig for multi-well UKCS drilling campaign
Serica Energy (AIM:SQZ), up 0.89% to 272.0p, has signed a contract for the Odfjell Drilling-operated rig Beacon Pacific to run a multi-well North Sea drilling campaign aimed at growing production across its UK Continental Shelf portfolio.
The contract covers six wells with options for further activity, and the London-listed producer said the campaign could add up to 30,000 boepd of incremental production, helping sustain overall portfolio output of 50,000 boepd into the next decade.
Drilling is scheduled to start in the third quarter of 2027, with the first wells targeting the Bruce field, the field's first drilling programme in almost fifteen years, last drilled in 2012.
Chief executive Chris Cox called the rig contract "an important milestone in delivering our organic growth programme," adding that the Bruce campaign will target "high-return infill wells with the potential for rapid payback," with potential to add more than 10,000 boepd from that field alone.
Locking in the rig more than a year ahead of spud gives Serica contractual certainty in a tightening North Sea drilling market, and the focus on brownfield infill at Bruce rather than new exploration fits the low-risk, rapid-payback model that has underpinned the company's cash generation since its North Sea consolidation push.
Plexus gains ADNOC approval opening UAE wellhead market
Plexus Holdings (AIM:POS), trading at 2.95p, has secured approval from Abu Dhabi National Oil Company for its wellhead technology, giving the specialist engineer a route into one of the Gulf's largest national oil company supply chains.
The approval follows Plexus's long-running push to diversify beyond its traditional UK and European customer base toward Middle East operators with sizeable, multi-year drilling programmes.
For a company of Plexus's scale, qualification with a major national oil company is a meaningful commercial milestone rather than an immediate revenue event, since conversion into actual contract awards typically follows well behind technical approval.
Even so, the ADNOC nod gives management a concrete reference point to cite as it pursues further Middle East business development.